I'm curious as to how often people upgrade or otherwise change their handsets.

For me it fluctuates but I don't think I've ever owned a phone for longer than 20 months, despite having a 24 month contract in the past. The shortest time I've owned a phone is about two months.

On average I probably switch phones about every 12 months.

How often is it for you?

Probably never now. I bought an HTC Desire S about 18 months ago and bought it for about £350 from O2 on PAYG. I have no reason to change it UNLESS technology improves to such a level that a smartphone is manufactured that can last for more than a couple of days without recharging - the bane of my life and makes these phones totally useless if one were to want to venture out into the wilderness.

I kept my HTC Touch HD for more than 2 years, after that I had something like 6 phones in less than a year (though only 1 of them I actually bought), the last of which (my Galaxy Nexus) I've now had for over a year - but in the last 6 months I've also had two handsets through work...

I've had my Samsung Galaxy Ace 2 since October 2012. I've had a couple of Chinese mobiles during that time but always preferred the Ace 2 so went back to it. Now I have no intention of changing again until it breaks.

Very variable - it used to be when I changed contracts but then I got cheaper contracts and kept a more expensive phone so have only changed when I wanted to now. I had an original iPhone for about 2 years, then moved through 3 phones in a year before settling on my Lumia 800 I have now.

Probably never now. I bought an HTC Desire S about 18 months ago and bought it for about £350 from O2 on PAYG. I have no reason to change it UNLESS technology improves to such a level that a smartphone is manufactured that can last for more than a couple of days without recharging - the bane of my life and makes these phones totally useless if one were to want to venture out into the wilderness.

Writing this on my HTC Desire S! I'll keep it for as long as it lasts, which I'm guessing will be a long time with its solid alu case.

I got it on an 18 month contract but decided not to upgrade at the end and just switched to a lower tariff.

Work gave me a GS3, but I prefer the Desire S as it is pocket sized and perfectly good for messaging and surfing (and Sense is streets ahead of touchwiz).

Had a Samsung Galaxy Apollo back in Feb 2011 just literally this week bought a Galaxy Ace 2 which is a massive improvement on the old phone. I'm not tied into any contracts anymore just a rolling 30 day contract now so always buy my own when the phone I'm using starts to look and feel tired.

I don't use my phone much, however it has to be waterproof and drop proof, I only change my phone when it wears out. My current Phone is about 3 years old, the previous phone I owned it for over 5 years.

Sadly there are not that many phones on the market that meets my simple requirements so my choice is very limited.